You can append new column data onto an existing array provided the heights are equal by concatenating the new vector onto the old array.
A % Some original array of data such that. [rows,cols] = size(A);
B = []; % Empty array
for c=1:cols
inxi = A(:,c);
% Some calculations
% inxi = ...
% Recontructing a new matrix from the modified columns
% B(:,c) = [B,inxi];
B = [B,inxi]; % Removed array index from left-hand side of the operation
end
You can also perform calculations directly to various columns of your original array.
B = A; % Copy data to a new variable to preserve the orginal array
B(:,1) = B(:,1)...; some calculation
